Malicious PDF — malware analysis report

Static analysis result for SHA-256 01fb27d8ebe2b812…

MALICIOUS

PDF

111.4 KB Created: 2021-07-20 06:47:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 38441802e3064267e50b7177c8902c2a SHA-1: fd42b9d60cfc3585c5d61b19e425f09b7843980d SHA-256: 01fb27d8ebe2b812872cf6ad9f6a8b510327c49fc2f06170d782d1b963be994f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to redirect users to malicious content. ClamAV and ML classifiers confirm its malicious nature, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns strongly suggest a malicious intent to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9885

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://altelaw.com/uploads/image/file/99092036302.pdf In PDF document text
    • http://asustainable.com/global/file/zutumezedejasili.pdfIn PDF document text
    • https://area34.info/wp-content/plugins/super-forms/uploads/php/files/1rr4230ajcq7qsko7mrv1rcji7/palefososakadazopikav.pdfIn PDF document text
    • http://vizugy.hu/uploads/files/52032435047.pdfIn PDF document text
    • https://luyenthitoeic.info/userfiles/file/72058415247.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e07f33da9e---lomuza.pdfIn PDF document text
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/160942fdc8f34b---19456287331.pdfIn PDF document text
    • http://xn--2vxr09c6mc.tw/CKEdit/upload/files/16091467119.pdfIn PDF document text
    • http://volamtuyetthe.com/userfiles/file/maliwagipunusope.pdfIn PDF document text
    • https://monocroma.it/wp-content/plugins/super-forms/uploads/php/files/3fa3cdfab143d55358c94a8a12440507/58983672538.pdfIn PDF document text
    • http://spamsmsgiare.com/media/ftp/file/powatibuxuginovufaluzefe.pdfIn PDF document text
    • http://telegid.tv/userfiles/files/31029173931.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/160e3a5ab60e70---63519108124.pdfIn PDF document text
    • https://verandapattaya.com/userfiles/files/3943921385.pdfIn PDF document text
    • http://dharmapremipariwar.org/userfiles/file/41901808631.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d5c0ba8d34---46187087395.pdfIn PDF document text
    • https://prestinireedcorp.com/userfiles/files/vapapejatebu.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cec014e8915---16588193582.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/16086706f74d24---22958504768.pdfIn PDF document text
    • http://carsongrad75.com/clients/3/35/35717660c32d3dd9b0ffde8f33a19d23/File/tidupuxumibuxisotabix.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072f7839fa20---worijus.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160de3c66a71e8---76835315028.pdfIn PDF document text
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/5eda02762f2449e461cd04370def6b26/taxinibov.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=the+five+notes+of+the+pentatonic+scale+arePDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013fdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FDF 3580 bytes
SHA-256: 1850fb4152e26302bd95736f4da78d9489ecd75da0fb862601559e9e610365de
font_01_sfnt_off00014d8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D8B 10604 bytes
SHA-256: 8f3d33aef414a391c6b7f356f0908ace5489edc19ff52be30f2a4a5944128412
font_02_sfnt_off000165cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x165CC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00017dde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17DDE 19836 bytes
SHA-256: b54bde8cc2155a72086a4f32a5b4a178bb9e90ee22c8c9e318733da0da9d81ff

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